I would want to get a nice truck and trailer for my racing hobby....driving the car to the track and back home over the weekend makes it a lot more interesting, until you break an axle or blow the engine.

When I moved out I was forced to give up archery and had to sell my bow. If I had the cash, I would pick it back up in a heartbeat.
Although to be fair I don't think I really have the time for it these days anyway.

Swords. I have a small collection, but it isn't cheap. I would love an authentic antique Nihonto (hand crafted Japanese sword, using Japanese techniques, forged in Japan, using only Japanese materials) but those can run tens of thousands of dollars

Hot-air ballooning for sure. Every time its a nice still sunny day i want to be up there (although its pretty cold and noisy tbh)
Or for really expensive id go for zepplining (?) in a helium balloon or hydrogen, surley its got safer since the hindenburg almost 100 years ago